You can probably drive the bolt back through the transom using a hammer or
sledge hammer, and then a punch and a hammer. A hard strike should break it
free from the epoxy. If it's truly a carriage bolt, you don't want to try
to turn it. A carriage bolt has a round head and a square neck.

Alan Bergen
35 Mk III Thirsty
Rose City YC
Portland, OR



On Tue, Jul 20, 2021 at 2:42 PM dwight veinot via CnC-List <
cnc-list@cnc-list.com> wrote:

> Can you just grind it away and leave  it.
>
> On Tue, Jul 20, 2021 at 3:41 PM Bill Coleman via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> I have a Broken ¼ - 20 broken carriage bolt with around 2 threads showing
>> out my transom.
>>
>> 1 ½” is embedded in epoxy. An easy-out seems unlikely.  I did four, three
>> of them unscrewed successfully, but apparently I didn’t coat this one
>> thoroughly enough with the Vaseline.
>>
>>
>>
>> I am thinking that if I can heat the bolt up to around 300 degrees or so,
>> it will break the bond with the epoxy. A soldering iron seems **maybe**
>> possible, but that is only one side. I was wondering if I could heat it up,
>> like plumbers do with welders to melt frozen water lines, it might be an
>> option.
>>
>> But I don’t understand enough about electrical resistance to know how to
>> go about it. Using a battery for juice seems risky, having seen what
>> happens when I have shorted them out with a wrench –
>>
>> I do have a 30 amp adjustable Powerwerks power supply, which seems a
>> little safer.
>>
>> What I don’t understand, is if I can put a positive on one end of the
>> bolt, and negative on the other, will it heat the bolt, or will it just
>> melt the insulation off the wires? Or ruin the power supply? Or is it a
>> factor of the gauge of the wires?
>>
>>
>>
>> Bill Coleman
>>
>> Entrada, Erie, PA
>>
>>
>>
>>
>> Thanks to all of the subscribers that contributed to the list to help
>> with the costs involved.  If you want to show your support to the list -
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>> Thanks - Stu
>
> --
> Sent from Gmail Mobile
> Thanks to all of the subscribers that contributed to the list to help with
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>  Thanks - Stu
Thanks to all of the subscribers that contributed to the list to help with the 
costs involved.  If you want to show your support to the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

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